.demo {
  .el-carousel__item img {
    color: #475669;
    opacity: 0.75;
    line-height: 200px;
    margin: 0;
    text-align: center;
  }

  .el-carousel__item:nth-child(2n) {
    background-color: #99a9bf;
  }

  .el-carousel__item:nth-child(2n + 1) {
    background-color: #d3dce6;
  }
}
